ia64: setjmp: use HIDDEN_JUMPTARGET

Rather than opencode the __GI_xxx logic, use proper hidden helpers.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Fix spelling in manual, as in bug 16376
Fix ChangeLog
ia64: setjmp/longjmp: stop saving/restoring fpsr [BZ #16379]

The new tst-setjmp-fp test has been failing on IA64 because the setjmp
and longjmp helpers take care of saving/restoring the fpsr register.
Per the C standards, this is incorrect, so disable that logic.

URL: https://sourceware.org/bugzilla/show_bug.cgi?id=16379
Signed-off-by: Mike Frysinger <vapier@gentoo.org>